Bevmandy, they are quite lightweight any way - I usually take mine back each year with refills.
We use the liquid ones which save you putting tablets in daily.
I always use two in a studio apartment room and we never get bitten at night!!
They are definitely much more expensive in the resort these days, but all supermarkets, sell the full range and refills!
GOOD TIP.
Find an old disposed of phone card or take something similar with you.
Cut it to the same shape or size as the one by the door that turns on your electricity, (if fitted obviously).
When you go out at night - plug in the home-made plastic card and your electricity will stay on all evening,
thereby powering your Mozzie killer plug-in!! (also good for recharging your camera / phone batteries etc.).
when you return, no mozzies flying around!!
Remove in the morning so the maid does'nt spot it, (as they like to save on electricity while you are out), repeat daily!!